On 01/06/12 14:47, David Markey wrote:
Hi All,
Say I have this model
class TestModel(models.Model):
my_test = models.CharField(max_length=512, blank=True)
And I try this:
In [1]: from core.base.models import TestModel
In [2]: test_model = TestModel()
In [3]: test_model.my_test =*""*
In [4]: test_model.full_clean()
In [5]: test_model.save()
*Ok cool, this is expected.*
*
*
*How about:*
In [6]: test_model2 = TestModel()
In [7]: test_model2.my_test =*None*
In [8]: test_model2.full_clean()
In [9]: test_model2.save()
##*IntegrityError raised*
Is there a way for full_clean() to catch that the "my_test" field is
Null when it shouldn't be, when blank=True?
If I have blank=False, it wont validate when my_test="".
I think the behaviour is explained by the clean_fields method called by
full_clean:
for f in self._meta.fields:
if f.name in exclude:
continue
* # Skip validation for empty fields with blank=True. The
developer
# is responsible for making sure they have a valid value.
* raw_value = getattr(self, f.attname)
if f.blank and raw_value in validators.EMPTY_VALUES:
continue
https://github.com/django/django/blob/master/django/db/models/base.py#L851
I can't think of a way for you to avoid checking for whether
test_model2.my_test is None. Can you change the code that is assigning
test_model2.my_test = None? The default value for the CharField is the
empty string, which as you show in your first example, doesn't cause a
problem.
Cheers,
Alasdair
--
Alasdair Nicol
Developer, MEMSET
mail: [email protected]
web: http://www.memset.com/
Memset Ltd., registration number 4504980. 25 Frederick Sanger Road, Guildford,
Surrey, GU2 7YD, UK.
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